backup-automation/nextcloud/nextcloud-backup.sh

#!/bin/bash
SCRIPT_ABS_LOCATION=$(realpath "$(dirname "${0}")")

# shellcheck disable=SC1090
source "$SCRIPT_ABS_LOCATION/nextcloud-backup.env"

# shellcheck disable=SC1090
source "$SCRIPT_ABS_LOCATION/../logger.sh"

# Container Names 
APP_CONTAINER="nextcloud-app"          
DB_CONTAINER="nextcloud-db"          
BACKUP_CONTAINER="duplicati"

# Log file
LOG_FILE="$SCRIPT_ABS_LOCATION/nextcloud-backup.log"

# Database Settings
DB_USER="nextcloud"          

SOURCE_DIR="/mnt/data/nextcloud"

# Put Nextcloud in Maintenance Mode
log "Putting Nextcloud in maintenance mode..."
docker exec -u www-data "$APP_CONTAINER" php occ maintenance:mode --on || { log "Error: Failed to put Nextcloud in maintenance mode."; exit 1; }

# Dump Database          
log "Dumping Nextcloud database..."
DB_TMP_BAK_NAME="nextcloud-db_$(date +"%Y%m%d").bak"
docker exec "$DB_CONTAINER" /usr/bin/mariadb-dump \
  --single-transaction \
  -h localhost \
  -u "$DB_USER" \
  -p"$DB_PASSWORD" \
  nextcloud > "$SOURCE_DIR/$DB_TMP_BAK_NAME" || { log "Error: Failed to dump the Nextcloud database."; exit 1; }

# Backup all files to target destination
log "Backing up Nextcloud files and database..."
docker exec "$BACKUP_CONTAINER" \
	duplicati-cli backup \
	"ssh://$BACKUP_DESTINATION" \
	"$SOURCE_DIR/html/data" \
	"$SOURCE_DIR/html/config" \
	"$SOURCE_DIR/html/themes" \
	"$SOURCE_DIR/$DB_TMP_BAK_NAME" \
	--backup-name="nextcloud backup" \
        --keep-versions=7 \
	--auth-username="$SFTP_USERNAME" \
	--auth-password="$SFTP_PASSWORD" \
	--passphrase="$BACKUP_ENCR_PASSPHRASE" \
	--ssh-fingerprint="$SFTP_FINGERPRINT" \
	--prefix="nextcloud" || { log "Error: Failed to backup Nextcloud files and database."; exit 1; }

# Turn off Maintenance Mode
log "Turning off Nextcloud maintenance mode..."
docker exec -u www-data "$APP_CONTAINER" php occ maintenance:mode --off || { log "Error: Failed to turn off Nextcloud maintenance mode."; exit 1; }

# Delete temporary backup files
log "Deleting temporary backup files..."
rm "$SOURCE_DIR/$DB_TMP_BAK_NAME" || { log "Error: Failed to delete temporary databse file"; exit 1; }

log "Nextcloud backup completed successfully."